Air Pollution

Q.

Which of the following is not a pollutant?

1. SO₂

2. CO₂

3. CO

4. NO₂

Q.

Why is cigarette-smoking harmful ?

Q.

What are the components of clean, dry air ?

Q.

Which of the following represents the correct composition of air by volume?

1. Nitrogen - 21%, oxygen - 78% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

2. Nitrogen - 60%, oxygen - 38% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

3. Nitrogen - 21%, oxygen - 78% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

4. ​Nitrogen - 38%, oxygen - 60% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

Q.

Name the substance used for drying ammonia.

1. Quicklime

2. Concentrated Sulphuric acid

3. Phosphorous pentoxide

4. Calcium chloride

Q. Which compounds are responsible for the depletion of the ozone layer?

Q. How is the air dissolved in water different from ordinary air?

Q.

What is the unit used to measure atmospheric pollution?

Q. A student spilled a bottle of ammonia in one corner of the laboratory.soon the whole laboratory was filled with pungent irritating smell.The students immediately open the windows and doors of the laboratory and switched on the exhaust fans.after sometime students got relief. Explain what did actually happened

Q.

Oxygen is used in hospitals.

1. True

2. False

Q. Define ozone layer. Why is ozone layer getting depleted at higher level of the atmosphere?

Q. Photochemical smog formed in congested metropolitan cities mainly consists of

1. Ozone, peroxyacetyl nitrate and Nox
2. Smoke, peroxyacetyl nitrate and $S{O}_2$
3. Hydrocarbons, ozone and Sox
4. Hydrocarbons, $S{O}_2$ and $C{O}_2$

Q.

What is air pollution ? How does this pollution take place ?

Q.

Main source of water vapour is burning of _______ which produces carbon dioxide and water vapour.

1. Coal

2. Hydrocarbons

3. Oxygen

4. Natural gas

Q.

What are the two activities which are majorly responsible for air pollution?

Q.

Why mountainers have to carry oxygen cylinder with them?

Q.

What is the leading cause of water pollution in India?

1. Agricultural activities

2. Untreated sewage

3. Nuclear waste

4. Factory waste

Q.

Which of the following is/are uses of Activated charcoal?

1. Decolourisation of solutions

2. Purification of sugar

3. Removal of taste

4. None of these

Q.

Mention common causes for air pollution?

Q.

How can we reduce air pollution?

Q.

What is the quantity of heavy water found in nature?

1. 1\6000

2. 1\6

3. 1\1000

4. 1\100

Q. Chlorofluorocarbons (CFCs) are used in:

1. refrigerators
2. air conditioners
3. aerosol sprays
4. all of the above

Q.

Volcanic eruptions pollute air, by releasing ___ and ___ into the air.

Q.

How can atmospheric pollution be caused by natural processes as well as by man-made activities?

Q. Match the following air pollutants with their adverse effects.

1. Acid rain
2. Damage ozone layer
3. Greenhouse effect
4. Oxygen deprivation

Q.

What will you obtain on reaction of calcium carbonate with dilute sulphuric acid?

1. Calcium sulphate, water and sulphur dioxide
2. Calcium sulphate, water and carbon dioxide
3. Calcium sulphate, sulphur dioxide and carbon dioxide
4. Calcium hydroxide, water and sulphur dioxide

Q.

In the set of the terms given below, there is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd term in the set and name the category to which the other three belong.

Automobiles, Volcanic eruptions, Power plants, Burning of wood.

Q. Name the main source of air pollution in urban areas.

Q.

While researching on various air pollutants, a scholar Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?

1. Hydrogen sulfide, $H_{2}S$

2. Hydrogen chloride, $HCl$

3. Carbon monoxide, $CO$

4. Sulphur dioxide, $S{O}_2$

Q. What is an atomiser?